error Asp 0115 – urgent!!!

Dear Friends,

I?ve got my homepage hosted in a webserver which is also my PDC running Win NT 4.0 sp6 and IIS 4.0. Everything was normal but recently I started to receive the message error Asp 0115 unexpected error home.asp a trappable error occurred in an external object. The script cannot continue running.
I?ve run the Symantec Fixklez.exe to see if there is some virus but nothing is detected.
What can it be.
My home page is not be browsed now.

Thanks

Paulo